The present disclosure provides a holographic display device including: a first substrate and a second substrate disposed opposite to each other, wherein a display screen disposed on the first substrate, and the display surface of the display screen faces the second substrate; and four trapezoidal holographic plates, wherein the upper side edge of each trapezoidal holographic plate is movably connected to the first substrate, the lower side edge of each trapezoidal holographic plate is movably connected to the second substrate; wherein the holographic display device has a first state and a second state, wherein in the first state, four trapezoidal holographic plates enclose a four-sided prismoid structure and are supported between the first substrate and the second substrate; in the second state, the first substrate and the second substrate are stacked, and four trapezoidal holographic plates are unfolded to be in the same plane and stacked between the first substrate and the second substrate. The holographic display device provided by the present disclosure can realize miniaturization and improve portability.

The present disclosure provides a holographic display device including: a first substrate and a second substrate disposed opposite to each other, wherein a display screen disposed on the first substrate, and the display surface of the display screen faces the second substrate; and four trapezoidal holographic plates, wherein the upper side edge of each trapezoidal holographic plate is movably connected to the first substrate, the lower side edge of each trapezoidal holographic plate is movably connected to the second substrate; wherein the holographic display device has a first state and a second state, wherein in the first state, four trapezoidal holographic plates enclose a four-sided prismoid structure and are supported between the first substrate and the second substrate; in the second state, the first substrate and the second substrate are stacked, and four trapezoidal holographic plates are unfolded to be in the same plane and stacked between the first substrate and the second substrate. The holographic display device provided by the present disclosure can realize miniaturization and improve portability.

A hand-held emergency vision device includes a hand-held emergency vision device having an enclosed tubular housing with a first end and a second end. The enclosed tubular housing has an expanded shape memory form. First and second clear members are provided at the first and second ends, respectively; and the tubular housing is compressible to an unexpanded compact form. The housing is releasably held in its compact form, and is self-expandable to its expanded shape memory form when released from its compact form.

A hand-held emergency vision device includes a hand-held emergency vision device having an enclosed tubular housing with a first end and a second end. The enclosed tubular housing has an expanded shape memory form. First and second clear members are provided at the first and second ends, respectively; and the tubular housing is compressible to an unexpanded compact form. The housing is releasably held in its compact form, and is self-expandable to its expanded shape memory form when released from its compact form.

A foldable virtual reality display device that includes a central board, which is provided with image displays in the user's viewing direction; first and second hinges provided at the front end and the rear end of the central board; left and right image plates folded toward left and right surfaces of the central board with respect to the first hinge; and left and right lens plates folded toward both left and right surfaces of the central board with respect to the second hinge. When used, the optical axis of the left and right image plates corresponds to the optical axis of the left and right lenses, and simultaneously corresponds to the focal distance between the left and right lenses, and when carried, the left and right image plates and the left and right lens plates are folded with respect to the both left and right surfaces of the central board.

A foldable virtual reality display device that includes a central board, which is provided with image displays in the user's viewing direction; first and second hinges provided at the front end and the rear end of the central board; left and right image plates folded toward left and right surfaces of the central board with respect to the first hinge; and left and right lens plates folded toward both left and right surfaces of the central board with respect to the second hinge. When used, the optical axis of the left and right image plates corresponds to the optical axis of the left and right lenses, and simultaneously corresponds to the focal distance between the left and right lenses, and when carried, the left and right image plates and the left and right lens plates are folded with respect to the both left and right surfaces of the central board.

A mixed reality assembly includes a curved mirror, a display apparatus, a motion detection module, and a display control module. The display apparatus is within a focal length of the curved mirror and has a display surface facing the curved mirror. The motion detection module is configured to detect a motion of a real object. The display control module is configured to control a display image on the display surface in response to the detected motion of the real object.

A mixed reality assembly includes a curved mirror, a display apparatus, a motion detection module, and a display control module. The display apparatus is within a focal length of the curved mirror and has a display surface facing the curved mirror. The motion detection module is configured to detect a motion of a real object. The display control module is configured to control a display image on the display surface in response to the detected motion of the real object.

A portable virtual reality device, which is provided with a board having a length to correspond to the focal distances of the left and right lens; a supporting board that is deployed and foldable based on the board; left and right lens plates that are deployed and folded left and rightward on a rear surface of the board based on the board. The smart phone is mounted simply to correspond to the focal distances of the left and right lens when it is used, and when it is carried, the left and right lens plates and the supporting board are folded to form a thin film to be carried conveniently.

A portable virtual reality device, which is provided with a board having a length to correspond to the focal distances of the left and right lens; a supporting board that is deployed and foldable based on the board; left and right lens plates that are deployed and folded left and rightward on a rear surface of the board based on the board. The smart phone is mounted simply to correspond to the focal distances of the left and right lens when it is used, and when it is carried, the left and right lens plates and the supporting board are folded to form a thin film to be carried conveniently.